// Copyright 2014 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef BASE_MAC_MACH_LOGGING_H_
#define BASE_MAC_MACH_LOGGING_H_

#include <mach/mach.h>

#include "base/base_export.h"
#include "base/logging.h"
#include "base/macros.h"
#include "build/build_config.h"

// Use the MACH_LOG family of macros along with a mach_error_t (kern_return_t)
// containing a Mach error. The error value will be decoded so that logged
// messages explain the error.
//
// Use the BOOTSTRAP_LOG family of macros specifically for errors that occur
// while interoperating with the bootstrap subsystem. These errors will first
// be looked up as bootstrap error messages. If no match is found, they will
// be treated as generic Mach errors, as in MACH_LOG.
//
// Examples:
//
//   kern_return_t kr = mach_timebase_info(&info);
//   if (kr != KERN_SUCCESS) {
//     MACH_LOG(ERROR, kr) << "mach_timebase_info";
//   }
//
//   kr = vm_deallocate(task, address, size);
//   MACH_DCHECK(kr == KERN_SUCCESS, kr) << "vm_deallocate";

namespace logging {

class BASE_EXPORT MachLogMessage : public logging::LogMessage {
public:
    MachLogMessage(const char* file_path,
        int line,
        LogSeverity severity,
        mach_error_t mach_err);
    ~MachLogMessage();

private:
    mach_error_t mach_err_;

    DISALLOW_COPY_AND_ASSIGN(MachLogMessage);
};

} // namespace logging

#if defined(NDEBUG)
#define MACH_DVLOG_IS_ON(verbose_level) 0
#else
#define MACH_DVLOG_IS_ON(verbose_level) VLOG_IS_ON(verbose_level)
#endif

#define MACH_LOG_STREAM(severity, mach_err) \
    COMPACT_GOOGLE_LOG_EX_##severity(MachLogMessage, mach_err).stream()
#define MACH_VLOG_STREAM(verbose_level, mach_err) \
    logging::MachLogMessage(__FILE__, __LINE__,   \
        -verbose_level, mach_err)                 \
        .stream()

#define MACH_LOG(severity, mach_err) \
    LAZY_STREAM(MACH_LOG_STREAM(severity, mach_err), LOG_IS_ON(severity))
#define MACH_LOG_IF(severity, condition, mach_err)   \
    LAZY_STREAM(MACH_LOG_STREAM(severity, mach_err), \
        LOG_IS_ON(severity) && (condition))

#define MACH_VLOG(verbose_level, mach_err)                 \
    LAZY_STREAM(MACH_VLOG_STREAM(verbose_level, mach_err), \
        VLOG_IS_ON(verbose_level))
#define MACH_VLOG_IF(verbose_level, condition, mach_err)   \
    LAZY_STREAM(MACH_VLOG_STREAM(verbose_level, mach_err), \
        VLOG_IS_ON(verbose_level) && (condition))

#define MACH_CHECK(condition, mach_err)                         \
    LAZY_STREAM(MACH_LOG_STREAM(FATAL, mach_err), !(condition)) \
        << "Check failed: " #condition << ". "

#define MACH_DLOG(severity, mach_err) \
    LAZY_STREAM(MACH_LOG_STREAM(severity, mach_err), DLOG_IS_ON(severity))
#define MACH_DLOG_IF(severity, condition, mach_err)  \
    LAZY_STREAM(MACH_LOG_STREAM(severity, mach_err), \
        DLOG_IS_ON(severity) && (condition))

#define MACH_DVLOG(verbose_level, mach_err)                \
    LAZY_STREAM(MACH_VLOG_STREAM(verbose_level, mach_err), \
        MACH_DVLOG_IS_ON(verbose_level))
#define MACH_DVLOG_IF(verbose_level, condition, mach_err)  \
    LAZY_STREAM(MACH_VLOG_STREAM(verbose_level, mach_err), \
        MACH_DVLOG_IS_ON(verbose_level) && (condition))

#define MACH_DCHECK(condition, mach_err)          \
    LAZY_STREAM(MACH_LOG_STREAM(FATAL, mach_err), \
        DCHECK_IS_ON() && !(condition))           \
        << "Check failed: " #condition << ". "

#if !defined(OS_IOS)

namespace logging {

class BASE_EXPORT BootstrapLogMessage : public logging::LogMessage {
public:
    BootstrapLogMessage(const char* file_path,
        int line,
        LogSeverity severity,
        kern_return_t bootstrap_err);
    ~BootstrapLogMessage();

private:
    kern_return_t bootstrap_err_;

    DISALLOW_COPY_AND_ASSIGN(BootstrapLogMessage);
};

} // namespace logging

#define BOOTSTRAP_DVLOG_IS_ON MACH_DVLOG_IS_ON

#define BOOTSTRAP_LOG_STREAM(severity, bootstrap_err)     \
    COMPACT_GOOGLE_LOG_EX_##severity(BootstrapLogMessage, \
        bootstrap_err)                                    \
        .stream()
#define BOOTSTRAP_VLOG_STREAM(verbose_level, bootstrap_err) \
    logging::BootstrapLogMessage(__FILE__, __LINE__,        \
        -verbose_level, bootstrap_err)                      \
        .stream()

#define BOOTSTRAP_LOG(severity, bootstrap_err) \
    LAZY_STREAM(BOOTSTRAP_LOG_STREAM(severity, \
                    bootstrap_err),            \
        LOG_IS_ON(severity))
#define BOOTSTRAP_LOG_IF(severity, condition, bootstrap_err)   \
    LAZY_STREAM(BOOTSTRAP_LOG_STREAM(severity, bootstrap_err), \
        LOG_IS_ON(severity) && (condition))

#define BOOTSTRAP_VLOG(verbose_level, bootstrap_err)                 \
    LAZY_STREAM(BOOTSTRAP_VLOG_STREAM(verbose_level, bootstrap_err), \
        VLOG_IS_ON(verbose_level))
#define BOOTSTRAP_VLOG_IF(verbose_level, condition, bootstrap_err)   \
    LAZY_STREAM(BOOTSTRAP_VLOG_STREAM(verbose_level, bootstrap_err), \
        VLOG_IS_ON(verbose_level) && (condition))

#define BOOTSTRAP_CHECK(condition, bootstrap_err)                         \
    LAZY_STREAM(BOOTSTRAP_LOG_STREAM(FATAL, bootstrap_err), !(condition)) \
        << "Check failed: " #condition << ". "

#define BOOTSTRAP_DLOG(severity, bootstrap_err)                \
    LAZY_STREAM(BOOTSTRAP_LOG_STREAM(severity, bootstrap_err), \
        DLOG_IS_ON(severity))
#define BOOTSTRAP_DLOG_IF(severity, condition, bootstrap_err)  \
    LAZY_STREAM(BOOTSTRAP_LOG_STREAM(severity, bootstrap_err), \
        DLOG_IS_ON(severity) && (condition))

#define BOOTSTRAP_DVLOG(verbose_level, bootstrap_err)                \
    LAZY_STREAM(BOOTSTRAP_VLOG_STREAM(verbose_level, bootstrap_err), \
        BOOTSTRAP_DVLOG_IS_ON(verbose_level))
#define BOOTSTRAP_DVLOG_IF(verbose_level, condition, bootstrap_err)  \
    LAZY_STREAM(BOOTSTRAP_VLOG_STREAM(verbose_level, bootstrap_err), \
        BOOTSTRAP_DVLOG_IS_ON(verbose_level) && (condition))

#define BOOTSTRAP_DCHECK(condition, bootstrap_err)          \
    LAZY_STREAM(BOOTSTRAP_LOG_STREAM(FATAL, bootstrap_err), \
        DCHECK_IS_ON() && !(condition))                     \
        << "Check failed: " #condition << ". "

#endif // !OS_IOS

#endif // BASE_MAC_MACH_LOGGING_H_
